Weight loss and elimination of planktonic foraminiferal tests in a dissolution experiment.

Regenberg, Marcus, Schroeder, Jan F., Jonas, Ann-Sophie, Woop, Christopher and Gorski, Larissa (2013) Weight loss and elimination of planktonic foraminiferal tests in a dissolution experiment. Journal of Foraminiferal Research, 43 (4). pp. 406-414. DOI 10.2113/gsjfr.43.4.406.

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Supplementary data:

Abstract

Their ubiquitous distribution and common occurrence in marine sediments make planktonic foraminiferal tests an ideal archive of past physical conditions of the upper oceans. However, their tests are prone to dissolution, especially in the deep sea. Their species-dependent removal from sediments is well-recorded, and is exhibited by the absence of some species after complete test disintegration, while others still remain. In order to further understand the dissolution process of planktonic foraminiferal calcite, we treated tests of Globorotalia cultrata, Globigerinoides ruber, and Neogloboquadrina dutertrei (315–355 μm intermediate diameter) with a weak buffered acetic acid. We recorded the number of intact tests and test weight during timed exposures to the acid. Effects ranged from excellent initial preservation to gentle, moderate, and severe dissolution and complete disintegration. Progressive dissolution is indicated by a linear decrease in the number of complete tests. While all three species show continuously decreasing test weight (when subjected to treatment with acid), discus-shaped tests of G. cultrata were more prone to dissolution, losing twice as much calcite as the globular tests of G. ruber and N. dutertrei.

Document Type: Article
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.2113/gsjfr.43.4.406
ISSN: 0096-1191
Projects: Future Ocean
Date Deposited: 23 Jul 2014 12:49
Last Modified: 11 Mar 2016 13:29
URI: http://oceanrep.geomar.de/id/eprint/25157

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